Preferred language and keyboard layout problem

[Deleted user]

I've an Atlassian SourceTree (4.1) installation on my Mac OSX (Catalina) and for some reason I can't input some character correctly.

I mean: I've an italian keyboard layout but when I type ":" into che commit message textarea the ":" character become ">", the "/" become "&" 

This problem seems related to the "preferred language" in settings.

If I switch from English (U.S.) to italian then chars input work correctly but ... I don't want the italian localization so, is there a way to have the SourceTree UI in english without the U.S. Keyboard layout?